Radio Station Information



Tucson's Most Stimulating Talk

City of License:
Tucson, AZ


Tucson, AZ

Web site:

Live Stream:

General Manager:
Tom Zlaket

iHeartMedia (formerly known as Clear Channel) (Capstar Tx, LLC)

3202 N Oracle Rd
Tucson, AZ 85705


KNST is an AM radio station broadcasting at 790 KHz. The station is licensed to Tucson, AZ and is part of that radio market. The station airs news/talk programming and goes by the name "KNST AM790" on the air with the slogan "Tucson's Most Stimulating Talk". KNST is owned by iHeartMedia under the supervision of General Manager Tom Zlaket.

Also heard on FM at 97.1 FM.

Nearby Radio Stations

La Buena 94.3 / 990, KUAZ 89.1 FM, The Source 1290, 1400 KTUC, KTDT 99.1 FM, KCEE 690 AM, Family Life Radio 104.1, Rock 102, KGMS 940 AM, Tejano 1600

Co-Owned Radio Stations in Tucson, AZ

My 92.9, Hot 98.3, 93.7 KRQ, Fox Sports 1450, Tejano 1600, 97.1 The Bull

Listener Comments and Reviews

Megan McCain will drive listener off your channel. Megan was Trashing Trump just like her father. I will turn off 790 if you keep McCain
By: George Peet on January 26, 2017

Thanks for having Ground Zero with Clyde Lewis! How about a couple more hours of his show? Keep up the good work
By: Rosemary on December 26, 2017

You know, Donald Trump calls news fake news. I can say that your news is not fake which is good. I am a bit disjointed in the some of the verbiage of Garret Lewis for their are times that much of the verbiage out of garrets mouth generates negativism regarding his views on things both locally and nationally. This can generate the same negativism in the listeners. I realize that this is done to generate a large listening base for knst and increase ratings. Also, the monies received by garret Lewis from his advertising of products may far exceed the wage that is received by knst. I often have to turn off knst because of the anger and foment that is generated by Garret Lewis. There are times when the station is not "Tucson Most Stimulating Talk" but rather "Tucson's Most Depressing talk because of the negativism communicated. I realize that you need to maintain a listener base for increased revenue for knst and garret will do anything to increase his income from the advertisers and negativism. Certainly there are radio hosts that can produce a more balanced approach to things. By the way, I am a Republican and not a Democrat. ~ Bob Black
By: Robert Black on June 13, 2018

We need a couple more hours of Ground Zero with Clyde Lewis......Great show...better than Glen Beck..
By: ronald p olivier on November 6, 2018

I love the line up on KNST AM...Listen all the time. Do not care for Glen Beck Show at all. Would like to see Ground Zero with Clyde Lewis his slot permanently with more air time. We all love the Ground Zero Show and George Noory Coast to Coast....Number 1 shows
By: linda marciniak olivier on November 6, 2018

I do 2 radio shows and a Podcast. The radio shows are on the Internet with a Global audience on the Late Night in the Midlands platform. ( ). I am interested in knowing how we go about getting one of my shows Syndicated on your station. Here is a sample of one of my shows: Here are where many of the shows are archived: We are transmitted on 7 or 8 different platforms - Youtube - iTunes - Google etc Please let me know, or maybe we can talk. Aage Nost 520-481-1507
By: Aage Nost on November 12, 2018

I live in oro valley az on lamber lane dr. and cannot get knst 790 on my radio only static and can get fm stations ok on radio what is the trouble? why cant I get am stations? thanks
By: pat doyle on December 11, 2018

You now have a '7-Up' commercial with a gal with a squeaky voice that is nearly as bad as the recent Goettl-associated Sunny Plumbers. Please yank the commercial and never, ever, use that voice actress again. Whenever the commercial comes up, I turn off the IN feed (or radio), for silence is preferable to her screeching sales pitch, and believe me, I will never buy 7-Up again, just based on that commercial (it's not that good, anyway). Additionally, you have about 20+ minutes per hour of advertising...Whenever an ad comes up, I silence the feed (remote controls are great!). Your commercial greed is killing broadcast radio; be advised. Pete
By: Pete on June 20, 2019

I absolutely LOVE the first hour of "Rosie On The House" on Saturday mornings! This is the part of the show about plants. But when the second hour comes on at 9 o"clock, there is an old man with with a horrible, scratchy, hoarse, raspy voice. It is the absolutely WORST voice I have ever heard on radio. You need to GET RID OF THAT AWFUL OLD GUY!! What are you thinking, having him on the radio????
By: Louise Meyer on November 9, 2019

Along with many others--I live in Robles Junction. The station fades when driving home at about Kinny/Ajo. I assume $$ is the issue??
By: Daniel James on January 18, 2020

Post a Comment

You can add your own comment to this channel by using the form below.